feat: add lalrpop parser (#2524)

LALRPOP is a parser generator for Rust. This only parses the LALRPOP
side of the generator, not the nearly-rust code of the actions.

queries/lalrpop/highlights.scm

@@ -0,0 +1,57 @@
+[
+ 	"pub"
+	"grammar"
+	"match"
+	"extern"
+	"type"
+	"enum"
+] @keyword
+
+[
+ 	"+"
+	"*"
+	"?"
+] @operator
+
+(grammar_type_params
+	"<" @punctuation.bracket
+	">" @punctuation.bracket)
+
+(symbol
+	"<" @punctuation.bracket
+	">" @punctuation.bracket)
+
+(binding_symbol
+	"<" @punctuation.bracket
+	">" @punctuation.bracket)
+
+(binding_symbol
+	name: (identifier) @parameter)
+
+(bare_symbol
+  (macro 
+    ((macro_id) @function)))
+
+(bare_symbol
+  (identifier) @function)
+
+(nonterminal_name
+  (macro_id) @function)
+
+(nonterminal_name
+  (identifier) @function)
+
+(nonterminal
+  (type_ref) @type)
+
+"(" @punctuation.bracket
+")" @punctuation.bracket
+"[" @punctuation.bracket
+"]" @punctuation.bracket
+
+";" @punctuation.delimiter
+
+(lifetime (identifier) @label)
+
+(string_literal) @string
+(regex_literal) @string

queries/lalrpop/locals.scm

@@ -0,0 +1,5 @@
+(nonterminal_name 
+  (macro_id) @definition.function)
+
+(nonterminal_name
+  (identifier) @definition.function)